当我在 VueJS 中单击下一个或上一个按钮时显示一个列表

Question

I would like to manage a case in js view. I have a list of employees who arrive in a department and also leave the department. My list returns me 3 objects (entries and exits) for the current week, the next week and the week after. By default, I display the entries and exits of the current week and I would like with two buttons previous and next to display the other weeks and return to the previous week with the previous button. It's possible to call a watch in Vue JS

<template>
    <div class="employee-list">
        <ul>
            <li v-for="employee in employees" :key="employee.id">
                <div class="employee">
                    <p class="name">{{ employee.name }}</p>
                    <p class="dept">{{ employee.dept }}</p>
                </div>
            </li>
        </ul>
    </div>
    <div>
        <button type="button" @click="selectemployee(employee)" class="btn btn-primary btn-lg">Previous</button>
        <button type="button" @click="selectemployee(employee)" class="btn btn-secondary btn-lg">Next</button>
    </div>
</template>

<script>
    export default {
        props: {
            employees: [
  {
    "inputs": [
      {
        "id": "38",
        "name": "Marcus",
        "dept": "Informatic Technology",
      },
      {  
        "id": "48",
        "name": "Dimitri",
        "dept": "Marketing",
      }
    ],
    "outputs": [
               {
        "id": "36",
        "name": "John",
        "dept": "Businnes",  
      },
      {
        "id": "82",
        "name": "Greg",
        "dept": "Marketing",
      }
               ]
  },
  {
    "inputs": [
               {
        "id": "50",
        "name": "Emilie",
        "dept": "Informatic Technology",
      },
      {
        "id": "15",
        "name": "Julian",
        "dept": "Marketing",
      }
               ],
    "outputs": [
       {
        "id": "60",
        "name": "Alan",
        "dept": "Informatic Technology",
      },
      {
        "id": "19",
        "name": "Mireille",
        "dept": "Marketing",
      }
    ]
  },
  {
    "inputs": [  
               {
        "id": "71",
        "name": "Dupond",
        "dept": "Informatic Technology",
      },
      {
        "id": "16",
        "name": "Dufourd",
        "dept": "Marketing",
      }
               ],
    "outputs": [
       {
        "id": "386",
        "name": "Tata",
        "dept": "Informatic Technology",
      },
      {
        "id": "198",
        "name": "Toto",
        "dept": "Marketing",
      }
    ]
  }
]
        },
        methods: {
            selectemployeePreviousOrNext(employee) {
            }
        }
    }
</script>

<style lang="scss" scoped>
.employees-list {
    flex: 2;
    max-height: 100%;
    height: 600px;
    overflow: scroll;
    border-left: 1px solid #a6a6a6;
    
    ul {
        list-style-type: none;
        padding-left: 0;

        li {
            display: flex;
            padding: 2px;
            border-bottom: 1px solid #aaaaaa;
            height: 80px;
            position: relative;
            cursor: pointer;

            &.selected {
                background: #dfdfdf;
            }

            span.unread {
                background: #82e0a8;
                color: #fff;
                position: absolute;
                right: 11px;
                top: 20px;
                display: flex;
                font-weight: 700;
                min-width: 20px;
                justify-content: center;
                align-items: center;
                line-height: 20px;
                font-size: 12px;
                padding: 0 4px;
                border-radius: 3px;
            }

            .employee {
                flex: 3;
                font-size: 10px;
                overflow: hidden;
                display: flex;
                flex-direction: column;
                justify-content: center;

                p {
                    margin: 0;

                    &.name {
                        font-weight: bold;
                    }
                }
            }
        }
    }
}

How can I do it please?

Answer 1

If I understood you correctly, try like following snippet

 new Vue({ el: "#demo", props: { employees: { type:Array, default: () => [ {"inputs": [{"id": "38", "name": "Marcus", "dept": "Informatic Technology",}, {"id": "48", "name": "Dimitri", "dept": "Marketing",}], "outputs": [{"id": "36", "name": "John", "dept": "Businnes",}, {"id": "82", "name": "Greg", "dept": "Marketing",}]}, {"inputs": [{"id": "50", "name": "Emilie", "dept": "Informatic Technology",}, {"id": "15", "name": "Julian", "dept": "Marketing",}], "outputs": [{"id": "60", "name": "Alan", "dept": "Informatic Technology",}, {"id": "19", "name": "Mireille", "dept": "Marketing",}]}, {"inputs": [{"id": "71", "name": "Dupond", "dept": "Informatic Technology",}, {"id": "16", "name": "Dufourd", "dept": "Marketing",}], "outputs": [{"id": "386", "name": "Tata", "dept": "Informatic Technology",}, {"id": "198", "name": "Toto", "dept": "Marketing",}]} ] } }, data() { return { week: {id: 0, title: "current week"} } }, methods: { employeesFilter(w) { return this.employees[w] }, selectemployee(w) { this.week.id += w this.week.id === 0 ? this.week.title = "current week" : this.week.id === 1 ? this.week.title = "next week" : this.week.title = "week after" } } })

 .employees-list { flex: 2; max-height: 100%; height: 600px; overflow: scroll; border-left: 1px solid #a6a6a6; } .employees-list ul { list-style-type: none; padding-left: 0; } .employees-list ul li { display: flex; padding: 2px; border-bottom: 1px solid #aaaaaa; height: 80px; position: relative; cursor: pointer; } .employees-list ul li selected { background: #dfdfdf; } .employee { flex: 3; font-size: 10px; overflow: hidden; display: flex; flex-direction: column; justify-content: center; } p, ul { margin: 0; } .employee .name { font-weight: bold; }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script> <div id="demo"> <div class="employee-list"> <p>{{ week.title }}</p> <ul> <li v-for="(employee, i) in employeesFilter(week.id)" :key="i"> <p>{{ i }}-{{ employee.length }}</p> <ul v-if="employee.length"> <li v-for="empl in employee" :key="empl.id"> <div class="employee"> <p class="name">{{ empl.name }}</p> <p class="dept">{{ empl.dept }}</p> </div> </li> </ul> <p v-else>no people this week</p> </li> </ul> </div> <div> <button type="button" v-show="week.id > 0" @click="selectemployee(-1)" class="btn btn-primary btn-lg">Previous</button> <button type="button" v-show="week.id < 2" @click="selectemployee(1)" class="btn btn-secondary btn-lg">Next</button> </div> </div>

Answer 2

Just store the current week index and increase / decrease that index to change the week:

<template>
  <div>
    <div v-for="employee of weekEmployees">
      {{ employee.name}}
    </div>
    <button @click="prevWeek">Prev</button>
    <button @click="nextWeek">Next</button>
  </div>
</template>

<script>
export default {
  data () {
     return {
        week: 0,
        employees: [], // your array of 3 weeks of employees
     }
  },
  computed: {
    weekEmployees() {
      return this.employees[this.week]
    }
  },
  methods: {
    nextWeek() {
      if (this.week >= this.employees.length - 1) { return }
      this.week++
    },
    prevWeek() {
      if (this.week <= 0 ) { return }
      this.week--
    }
  }
}
</script>